getResourceLoader

Return the resource loader to use for resource locations.
Can be checked for the ResourcePatternResolver interface and cast
accordingly, for loading multiple resources for a given resource pattern.

Null suggests that absolute resource loading is not available
for this bean definition reader.

This is mainly meant to be used for importing further resources
from within a bean definition resource, for example via the "import"
tag in XML bean definitions. It is recommended, however, to apply
such imports relative to the defining resource; only explicit full
resource locations will trigger absolute resource loading.

There is also a loadBeanDefinitions(String) method available,
for loading bean definitions from a resource location (or location pattern).
This is a convenience to avoid explicit ResourceLoader handling.